Music Details Unit test

MusicDetailViewModelTest.kt

class MusicDetailViewModelTest {

    lateinit var SUT: MusicDetailViewModel

    @MockK
    val repo = mockk<MusicRepository>()

    @MockK
    val savedInstanceStateHandle = mockk<SavedStateHandle>(relaxed = true)

    @Before
    fun setUp() {
        SUT = MusicDetailViewModel(
            repository = repo,
            savedStateHandle = savedInstanceStateHandle,
        )
    }

    @Test
    fun `give ViewModel initialise, when Music Id is passed, then Music Detail state should be emitted`(): Unit =
        runTest {
            coEvery {
                savedInstanceStateHandle.getStateFlow(
                    any(),
                    1232
                )
            } returns emptyFlow<Int>().stateIn(this)

            coEvery { repo.getMusic(1232) } returns flow {
                emit(
                    MusicEntity(1232, "track name", "sf", "sfd", "sdf", "sdf")
                )
            }

            SUT = MusicDetailViewModel(
                repository = repo,
                savedStateHandle = savedInstanceStateHandle
            )

            SUT.state.test {
                val item = awaitItem()
                assertEquals(true, item.uiMModel.musicTitle.isEmpty())
                val item2 = awaitItem()
                assertEquals(false, item2.uiMModel.previewUrl.isEmpty())

            }
        }

    @After
    fun tearDown() {
        Dispatchers.resetMain()
    }
}